When primary school students learn multiplication, they are young, have poor acceptance ability and have no knowledge base of multiplication exchange law. The meaning of multiplication is formed on the basis of seeking the sum of addends. Distinguishing multiplicand and multiplier correctly and explaining their writing positions are helpful to understand and master the meaning of multiplication and the origin of the formula. After learning the law of multiplication and exchange, as long as it is the operation of finding the sum of the same addend when solving practical problems, the product of two factors can be correctly found, which is reasonable and correct. There is no need to distinguish which factor is the multiplicand and which factor is the multiplier, let alone emphasize the status of the two when you graduate from primary school. As for the names of the parts of the multiplication formula, the product is still called the product; Multiplier and multiplier are collectively referred to as factors of product, and there is no need to consider their position order.